Sand used to stop the green sand from sticking to the pattern is termed as the ________ sand?

Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids?

Rate constant ‘k’ and absolute temperature ‘T’ are related by collision theory (for bimolecular) as________?

In case of absorption, both the operating and equilibrium lines will be straight for________?

The composition of fresh feed to the high temperature, high pressure urea autoclave is________?

Stefan-Boltzmann law applies to ________ body?